Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 209

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Different applications for end mills The Metal Removal Rate (MRR) and the applications are strongly re- The recent Dormer catalogue was produced with simple icons that lated. For each different application we have a different MRR that in- show the different applications. creases with the engagement section of the cutter on the workpiece.

Side Milling Face Milling Slot Milling Plunge Milling Ramping

The radial depth of cut should beThe radial depth of cut should beMachining of a slot for keyways.It is possible to drill the workpieceBoth axial and radial entering into
less than 0.25 of the diameter ofno more than 0.9 of the diameter,The radial depth of cut is equal towith an end mill only with thethe workpiece.
the end mill.axial depth of cut less than 0.1 ofthe diameter on the end mill.cutting centre. In this operation

the diameter. the feed has to be halved.

Milling Effectively Types Of Cuts Climb Milling Versus Conventional Milling CLIMB MILLING CONVENTIONAL MILLING Chip formed Chip started max. thickness zero thickness

Rotation Rotation

Feed Feed

In climb milling, the cutter revolves in the same direction as the tableIn conventional milling, the cutter revolves opposite to the direction
feed. The tooth meets the work at the top of the cut, producing theof table feed. Therefore the width of the chip starts at zero and in-
thickest part of the chip first. In horizontal applications the resultantcreases to a maximum at the end of the cut. This can lead to accele-
force created by climb milling can act as a clamping force, acting to-rated tool wear under some conditions. Conventional milling may be
wards the machine table.advantageous when milling hot rolled steel, surface hardened and
It is important to make sure that the machine tool has no leadscrewsteels with a surface scale.

backlash. Normally climb milling improves product surface finish and increases tool life.

Peripheral Milling The milling of a surface which is parallel to the end mill axis.

PERIPHERAL (CYLINDRICAL, SLAB) MILLING

The radial depth of cut should be less than 0.1 of the diameter of the mill: ar < 0.1 DC.

ar < 0.1 DC